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Fix an annoying bug in tar. When it converted 'tar zcf' to 'tar -z -c -f'

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it forgot to null terminate the new argv[] array.  If you mixed this
with $TAR_OPTIONS, phkmalloc and a whole bunch of other variables, you
could end up with a segfault.  This isn't strictly a phkmalloc victory
since tar walks off the end of an array rather than use uninitialized
malloc memory, but phkmalloc makes it easier to provoke.
This commit is contained in:
Peter Wemm 2003-07-24 00:04:01 +00:00
parent fc3a3ee720
commit 022effcc3e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=117946
1 changed files with 4 additions and 1 deletions
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contrib/tar/src/tar.c
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@ -549,7 +549,7 @@ decode_options (int argc, char **argv)
/* Allocate a new argument array, and copy program name in it. */
new_argc = argc - 1 + strlen (argv[1]);
new_argv = xmalloc (new_argc * sizeof (char *));
new_argv = xmalloc ((new_argc + 1) * sizeof (char *));
in = argv;
out = new_argv;
*out++ = *in++;
@ -577,6 +577,9 @@ decode_options (int argc, char **argv)
while (in < argv + argc)
*out++ = *in++;
/* And NULL terminate the argv[] array */
*out++ = NULL;
/* Replace the old option list by the new one. */
argc = new_argc;